/* Copyright 2009 - 2010 The Stajistics Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.stajistics.jdbc.decorator;

import java.sql.SQLException;
import java.sql.Wrapper;

/**
 * 
 * @author The Stajistics Project
 *
 */
public abstract class AbstractWrapper implements Wrapper {

    protected abstract Wrapper delegate();

    @Override
    public boolean isWrapperFor(final Class<?> iface) throws SQLException {
        if (iface.isAssignableFrom(delegate().getClass())) {
            return true;
        }

        return delegate().isWrapperFor(iface);
    }

    @Override
    public <T> T unwrap(final Class<T> iface) throws SQLException {
        if (iface.isAssignableFrom(delegate().getClass())) {
            return iface.cast(delegate());
        }

        return delegate().unwrap(iface);
    }

}
